From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unwind \Un*wind"\, v. t. [AS. unwindan. See 1st Un-, and
Wind to coil.]
[1913 Webster]
1. To wind off; to loose or separate, as what or convolved;
to untwist; to untwine; as, to unwind thread; to unwind a
ball of yarn.
[1913 Webster]
2. To disentangle. [Obs.] --Hooker.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unwind \Un*wind"\, v. i.
To be or become unwound; to be capable of being unwound or
untwisted.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
unwind
v 1: reverse the winding or twisting of; "unwind a ball of yarn"
[syn: unwind, wind off, unroll] [ant: roll,
twine, wind, wrap]
2: separate the tangles of [syn: unwind, disentangle]
3: become less tense, rest, or take one's ease; "He relaxed in
the hot tub"; "Let's all relax after a hard day's work" [syn:
relax, loosen up, unbend, unwind, decompress, {slow
down}] [ant: tense, tense up]
4: cause to feel relaxed; "A hot bath always relaxes me" [syn:
relax, unstrain, unlax, loosen up, unwind, {make
relaxed}] [ant: strain, tense, tense up]